Polishing-machine for marble and analogous materials.



PATENTED NOV. 5, 1907 C. & J. D. STAMPER. POLISHING MACHINE FOR MARBLE AND ANALOGOUS MATERIALS.

2 SHEETS-SHEET 1.

APPLICATION FILED SEPT. 21,4906.

PATBNTED NOV. 5, 1907.

Q. & J. D. STAMPER. POLISHING MACHINE FOR MARBLE AND ANALOGOUS MATERIALS.

APPLIGATION FILED SEPT.1906.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

GHARLES'STAMPER AND JAMES J).

STAMPER, OF CINCINNATI, OHIO.

Specification of Letters Patent.

Patented Nov. 5, 1907.

A li ati fil d September 21, 1906. Serial No. 335,657.

To all whom it "may concern:

Be it known that we, OHARLEs STAMPER and .IAMEs D. STAMPER, citizens of the United States, and residents of the city of Cincinnati, in the county of I-Iam ilton and State of Ohio, have invented certain new and useful Improvements in Grit and Polishing Machines for Marble and other Analogous Materials, of which the following is a specification.

The mechanism embodying our invention is appli cable not only for the grinding and polishing of marble, but for the grinding and polishing of any other materials capable of such treatment, when it becomes desirable to subject them to either or both of such operations, namely: of grinding or polishing.

The several features of our invention and the various advantages resulting from their use conjointly or otherwise will be apparent from the following description and claims.

We will now proceed to describe our invention in detail.

In the accompanying drawings, making a part of this application, and in which similar letters of reference indicate corresponding parts,-Figure 1 is aperspective view of a machine embodying our invention, and placed upon a slab of marble supported on a table. Fig. 2 is a view partly insection and partly in elevation of the machine shown in Fig. 1. The section is a vertical one taken in the plane of the dotted line 2, 2, of Fig. 1. In this view, the ball and its lugs and the upward extension of this ball are shown in elevation. The pipe above the extension of the ball which is shown in Fig. 1, is omitted from this figure. Fig. 3 is a top view of the socket (the cover thereof having been removed) and showing the ball with lugs located therein, the upper end of the portion which is integral with the ball being shown in section. the section being a horizontal one taken in the plane of the dotted line y, y, of Fig. 2. Fig. 4 represents a vertical central section of one part of the machine. This section is taken in the plane of the dotted line 4, 4, of Fig. (i. The section is taken beginning above the horizontal plane of the dotted line 2', :r, of Fig. 2. and extending down to the bottom of the machine. Fig. 5 represents a vertical central section of another part of the machine. This section is taken in the plane of the dotted line 5. 5, of Fig. (i. The section is taken beginning above the horizontal plane of the dotted line rt, 0:, of Fig. 2, and extending down to the bottom of the machine. Fig. 6 is a plan view of some of the grit holders, adjacent to one another, when the elevating screw sleeve and the annular securing plate have been removed. Fig. 7 is a bottom view of some of the grit holders, showing certain of their relations to each other. Fig. 8 is a pm'spective view of the under side of that discal series of grit holders whose central connecting ring is uppermost. Fig. 9 is a perspectivc view of the top side of that discal series of grit holders whose central connecting ring is undermost. The discal series shown in these two Figs. 8 and 9 are so placed as to the better enable the reader to understand how the central ring in Fig. 8 fits down over the cylindrical ring in Fig. 9, with the understanding that an intermediate screw threaded cylinder fits over this last named cylindrical ring. Fig. 10 is a perspective view of this intermediate screw ring.

One of the objects of our invention is to provide con-- venient means whereby, in the same machine, polishing grits of different degrees of fineness for successive operations upon the stone to be ground and polished, are contained in the one machine and are capable of adjustment relatively to each other and to the stone to be operated upon, and of application successively to the stone to be ground and polished.

Other objects will be apparent in connection with the specification of the features of our invention.

The polishing disk is composed of a series of grits held in holders projecting radially from the central portion of the machine. The means for rotating the disk is adjustably connected to the disk by a joint which is substantially as follows. To this end, we interpose between the polishing disk and the means whereby a rotary movement is imparted to it, a joint which is substantially as follows. C indicates a socket and B the ball received therein. This ball has preferably an extension B The preferred means for imparting a rotatory movement to this ball consists of the shaft A extending beyond the extension as shown. For perfection and ease of construction, this shaft should be first made separately from the ball and inserted therein. v

For the retention of the ball B within the socket G, we provide a cap D, and means for securing it to the socket. In the present illustrative instance, thecap has an interior screw thread D adapted to engage the male screw thread 0 of the socket C. I

The preferred means for rotating the cap, so as to screw it down and upon the socket, or vice versa, are the sides (faces) D which latter constitute projections which a wrench can-engage. To enable the ball B, when rotated, to impart its rotation to the socket G, and thence to the polishing disk F, we provide grooves O in the socket G, and provide the ball with lugs (projections) B Each lug B fits into and can travel in its groove 0 The grooves are in planes parallelwith the plane of the axis of the socket G and disk F.

According to one feature of our invention, the four detents, or lugs B are located on the ball, in a plane passing through a diameter of the ball proper, as shown. Thus the part 0 and consequently the grinding disk have free opportunity to oscillate on these lugs as pivots.

We have shown four lugs B projecting from the ball. These, even if the grooves in which they worked fitted them closely, would give the socket great capacity for movement in various directions for enabling the grinding disk or plate to be flat against the article K. These grooves C are wider than the lugs B and afford the latter considerable play therein. In consequence, the capability of the ball and socket joint, as we thus construct it, allows the grinding disk to lie flat upon the table under all the requirements to which such a machine is subject.

The socket O is duly connected to the polishing disk.

As it 'is our purpose to use the foregoing feature of automatic adjustment, rendered possible by the ball and socket construction hereinbefore described, with a very advantageous construction of the disk for enabling grits of different degrees of fineness to be carried and successively applied to the stone or like article in the operation of polishing it, we will now describe such construction of the disk and then mention the preferred manner of connecting the socket to this constructed device.

There are two series of grit holders each of which when separated from the other will be seen to constitute a polishing disk of itself. Thus in Fig. 8, one series of the grit holders in the compound disk F constitutes a disk E, and in Fig. 9, the other series of the grit holders in the compound disk F constitutes a disk G.

Our improved construction enables the disk E with its grit holders to be used iii connection with the disk G and its grit holders. Both of the disks E and G are rotated by one and the same rotatory mechanism;

The grit holders of the disk E have grits of a given degree of fineness, and the'grit holders of the disk G have grits of a degree of fineness different from those of the disk E. The disk E with its grits can be elevated while the disk G with its grits are depressed, and vice versa.

The grit holders of each dis E and G are preferably hollow frames, into which grits of preferably the same shape as the interior space of each grit holder are respectively put. Any proper means for holding each grit in position in its holder may be employed. A convenient means is the set screw Z engaging a female screw in the holder and capable of being advanced into the holder and against the grit, to hold the latter stationary in the holder, and capable of being retracted, and thereby allowing the grit to be withdrawn, and a new one substituted therefor.

In order to utilize the space allowed by this construction, the grit holders of each of the disks E and G are made of the shape shown, and are larger at their Outer edge than at their inner one The grit holders of disk E are placed at intervals, so as to allow spaces V between them in which the grit holders of disk G can be respectively present and the grit holders of disk G are placed at intervals so as to allow spaces W between them in which the grit holders of disk E can be' respectively present.

We indicate each of the grit holders of the disk E by the character E We indicate each of the grit holders of the disk G by the character G The rear or inside end of each of the grit holders E of the disk. E extends upward and is connected to a ring E The rear or inside end of each of the grit holders G of the disk G is connected on a level to the cylindrical ring G This latter ring G extends up within the ring E. An intermediate cylindrical ring I is between the ring E of the grit holders E and the .cylindrical ring G. This intermediate ring J has an external (male) screw thread F. The ring E of the grit holders E has a screw thread E formed on its interior surface. The screw thread I of the intermediate rin .T engages the screw thread E of the ring E of the grit holders E The cylindrical ring G of the grit holders G extends up inside of this intermediate ring J. The cylindrical ring G and its grit holders G are supported by the intermediate ring J. A preferred means for so doing consists of the flat ring Q. latter rests upon the top of the intermediate cylindrical ring .I and is secured to the top of the ring G preferably by screws Q Q Q Q*, as indicated. But the (lat ring Q is not fastened to the top of the intermediate ring .I. On the contrary, this ring J is free to rotate under this ring Q. In order to enable the intermediate ring J to be rotated, we provide suitable means, preferably a ring S, fitted onto the periphery of ring .I and secured thereto by set screws S In the periphery of this actuating ring S are recesses S, wherein the point of a wrench suitable for such work can be introduced, and the ring S by means of said wrench be rotated.

The interior of the ring G is provided with a screw thread G adapted to engage a screw thread 0 on the lower extension (7 of the socket C. The screw connection G and is a preferred mode of connecting the rotatory socket with the compound disk F. Thus connected. the rotation of the main shaft A, through the intermediate connection of the ball and socket as described, rotates the disk G and the disk E.

The central opening provided in connection with the construction aforementioned is as follows:lhe shalt A is tubular and is therefore provided with a passage h'l. In the ball B is an orifice M v In the socket is a passage M, and in the ring G is a passage M extending down through this ring. These passages M, M M, M at all times so connect as to enable water i passing down through the pipe A to reach the article K which is being operated upon. The water flowing out from the bottom of passage M does lubricate, so to speak, the contact between the article K and the grits at work on it, and also serves to carry away the fine dust or pulverized matter which the grits make in grinding the article K. i

The operation of the disk E and the disk G relatively to the stone or other article to be ground and polished as follows: It makes no difference in the [inal result whether those coarser grits which are adapted for the first step in the operation of grinding and polishing be placed in the grit holders E or in the grit holders G In either event. the finer grits are put in the other grit holders, and where both sets of grits are successively used, the liner grits will obviously be ordinarily used last. For illustration. let usplace the coarser grits in the grit holders E and place the finer grits in the grit holders G The screw actuating ring S is now rotated, and thus the intermediate ring I is turned in the proper direction, and by means of the screw thread 'E in ring E and the screw thread J of the intermediate ring- .l, the ring E and its grit holders E arilowered and brought into contact with the stone or other article to be polished, and the ring G with its The grit holders 1 is elevated above and out of touch with the stone, etc. to be operated on. The machine is now set in motion, and the shalt A rotates and rotates the ball and socket and the latter rotates the ring G with its grit holders G and the latter rotates the rit holders E and their ring E". The intermediate ring I will rotate with the rings E and G lnsomuch as the coarser grits in the holders 11 are in contact w th the article to be ground, the latter will be grounded rapidly, and thus the object in using the coarser grits is'lully accomplished. When the grinding off of the material of the article has proceeded suilicicntly far, the machine is stopped. The intermediate ring J is now turned in a direction the contrary to that in which it was turned when the coarse grits in the holders E were put into contact with the article. As a result of this reverse rotation, the ring E is raised and its grit holders E are raised out of contact with the article which has been ground, and the ring G is lowered, and the grit holders fast to thisring G are brought down and the grits in these last named holders are brought into contact with the article which has been ground by the coarse grits. The machine is again started, and the grit holders are revolved. The fine rits grind off the article and give it a smoother and more polished surface. When this second operation has been finished, the machine is stopped and the article operated on is withdrawn. The foregoing operations are repeated upon a new article to be round and polished. Before beginning-to grind the new article, the intermediate scrcw ring J is again turned in a direction contrary to that in which it was last rotated, and the coarse grits in the holders E are lowered down upon the article to be ground, and the fine grits in holders G are raised away up out of contact with said article.

Where only one set oi the grits is employed, that set is lowered onto the article to be operated upon, and the other set moved up out of the way.

In explanation of the fact that the stem of the socket being connected with ring G only, turns not only the grit holders oi that ring, but also turns the ring E and the grit holders of the latter, it should be noted that the grit holders E of the ring E lie rcspcctivcl} between the respective grit holders G2 oi' the ring (i and in juxtaposition therewith. Hence the revolution of the grit' holders G compels the revolution of the grit holders E The separation vertically oi the two sets of grit hold- 01's is never so much as to have the holders E of the disk E out of contact with the holders G of disk G.

Among the various advantages resulting from the use of 'our invention are the following: The grit holders for the two kinds of grinding and polishing are always on hand and can be used at any time, and are ionvenicntly interchangeable. The compact and comparatively inexpens ve. The auto matic application to the levelot' the article to be ground by means of the ball and socket joint and its special construction, is an important advantage.

What we claim as new, and of our invention and desire to secure by Letters Patent, is:

1. In a grinding and polishing machine, the combination of a series of grit holders, connected to a ring, a series of grit holders connected to an inner ring, an intermediate screw threaded ring whose thread engages a thread on the mechanism is v interior of the first named or outer ring, and means for compelling the inner ring to rise and fall as this intermediate ring is raised or lowered relatively to the outer ring, substantially as and for the purposes specified.

2. In a grinding and polishing machine, the combination of a series of grit holders connected to a ring, a series of grit holders connected to an inner ring, an inter-mediate screw threaded ring whose thread engages a thread on the interior of the first named or outer ring, and a flat ring extending" over the top of the intermediate ring, and secured to the top of the inner ring, substantially as and for the purposes specified.

3. In a grinding and polishing machine, the combination of a series of grit holders forming a disk, and a second series of grit holders forming a disk, the grit holders of one series located alternately between the grit holders of the other series, and means for elevating and lowering the one series relatively to the other, substantially as and for the purposes specified.

-i. In a grinding and polishing machine, the combination of a series of grit holders connected to a ring, a series of grit holders connected to an inner ring, an intermediate screw threaded ring whose thread engages a thread on the interior of the first named or outer ring and means for causing the inner ring to rise and fall as this intermediate ring is raised or lowered relatively to the outer ring, and a ball and socket joint, connected to the inner ring of the series or grit holders, substantially as and for the purposes specified.

5. In a grinding and polishing machine, the combination or a series of grit holders forming a disk, and a second series of grit holders forming a disk. the grit holders of one series located alternately between the grit holders of the other series, means for elevating and depressing the one series relatively to the other, and a ball and socket joint,

substantially as and for the purposes specified.

6. In a discal grinding and polishing machine, the combination of means for imparting a rotary motion to the disk, and a ball joint inter-posed between the disk and the means for imparting rotary motion to the disk, the ball of the joint having lugs, located in the plane of a diameter of the ball, and respectively extending into grooves in the socket, and a series of grit holders connected to a ring, a series of grit holders connected to an inner ring, an intermediate screw threaded ring whose thread engages a thread on the interior of the first named or outer ring, and a flat ring extending over the top of the intermediate ring and secured to the top of the inner ring, each series of grit holders arranged to receive between successive grit holders the respective grit holdersof the other series, substantially as and for the purposes specified.

7. In a discal grinding and polishing machine, the combination of a socket secured to the disk, a ball received in this socket, a cap whereby the ball is kept in the socket, the lugs whereby a rotatory movement or the ball is communicated to the socket, these lugs being located in the plane of a diameter of the ball, a shaft connected to the ball, a conduit therein, and in the socket, and having its outlet at the grinding face of the disk, and a series of grit holder-s connected to a ring, a series of grit holders connected to an inner ring, an intermediate screw threaded ring whose thread engages a thread on the interior of the first named or outer ring, and a flat ring extending over the top of the intermediate ring and secured to the top of the inner ring, each series of grit holders arranged to receive between successive grit holders the respective grit holders of the other series, each series of grit holders ex tended out radially from their respective rings and in creasing in size toward the peripheral line of the disk, which they go to form, substantially as and for the pur poses specified.

S. In a grinding and polishing machine, the combination of a series of grit holders, connected to a ring, a series of grit holders connected to an inner ring, an inter-mediate screw threaded ring whose thread engages a thread on the interior of the first named or outer ring, and means for compelling the inner ring to rise and fall as this interme diate ring is raised or lowered relatively to the outer ring, the aforesaid mechanism provided with a central passageway for the introduction of water centrally to the article to be ground, substantially as and for the purposes specitied.

9. In a discal grinding and polishing machine, the combination of a socket secured to the disk, a ball received in this socket, a cap whereby the ball is kept in the socket, the lugs whereby a rotatory movement of the ball is communicated to the socket, these lugs being located in the plane of a diameter of the ball, a shaft connected to the ball, a conduit therein, and in the socket, and having its outlet at the grinding face of the disk, and a series of grit holders connected to a ring, a series of grit holders connected to an inner ring, an intermediate screw threaded ring whose thread engages a thread on the interior of the first named or outer ring, and a flat ring extending over the top 01 the intermediate ring and secured to the top of the inner ring, each series of grit holders arranged to receive between successive grit holders the respective grit holders of the other series, each series of grit holders extended out radially from their respective rings and increasing in size toward the peripheral line of the disk, which they go to form, the said shaft being provided with the passage M and a passage M M M provided through the ball, socket and rings for the conduct of water therethrough, substantially as and for the purposes specified.

CHARLES STAMPER. JAMES D. STAMPER.

Witnesses as to Charles Stamper:

CHAS. M. PARRISH, W. M. MCMEANS, Witnesses as to James D. Stamper:

SAMUEL A. Wns'r, K. SMITH. 

